1. show version 

2. control break

3.confreg 0x2102 /confreg 0x2142

4. reset 

5.copy startup config running config




{{:cisco:cisco-pass-brack.png?600|}}



====== FULL PROCESS ======
 

  * Reset CISCO Router Password
  * ## Reset CISCO Router Password ##
  * 
  * ** Connect console cable directly with router
  * and open Hyper Terminal or Tera Term  or Putty or any others
  * 
  * ** Press two times "break" button to enter rommon mode
  * 
  * Alt + b == for TeraTerm software to break
  * 
  * Ctrl + Break == for Hyper terminal
  * 
  * Ctrl + Break == for terminal
  * 
  * rommon 1>
  * 
  * ** change config register from 0x2102 to 0x2142 to bypass passowrd
  * 
  * rommon 1> confreg 0x2142
  * 
  * ** type reset to restart router or poweroff-on manually
  * rommon 2> reset
  * 
  * type "no" or Ctrl+C to skip setup procedure
  * and finally press enter for login
  * 
  * router>
  * router>enable
  * router#
  * router# configure memory
  * router# configure terminal
  * router(config)#
  * router(config)# enable secret newpassowrd
  * router(config)#
  * router(config)#config-register 0x2102
  * router(config)# exit
  * router#
  * router# write  or copy running-config startup-config
  * 
  * ** if you want to erase all previous configureations then follow bellow
  * 
  * router#
  * router# write erase
  * Erasing the nvram filesystem will remove all configuration files! Continue? [confirm]
  * <Press Enter key>
  * router#
  * Router#reload
  * Do you want to reload the internal AP ? [yes/no]: yes
  * Proceed with reload? [confirm]
  * 
  * ...
  * Would you like to enter the initial configuration dialog? [yes|no] no <Press Enter key>
  * –OR–
  * Do you want to save the configuration of the AP? [yes|no] no <Press Enter key>